There are some reasons why it is not working1- If '2' as well as '@' does not work, the key is sticky or broken. press the '@' key then press any other similar key, for example '#' and see if you notice any physical difference. If you do, take the key off carefully by getting a blunt object such as a butter knife and carefully pry it off and check to see if it looks to be in working order. If you can't tell pry open a similar key, for example '#' and look to see any physical difference with the keys. To put the keys back, simply place the keys back where they belong and apply force until you hear a clicking noise.2- The keyboard may be faulty and not recongnise '@' when you press it. first unplug your keyboard, plug it back in and try again to see if it works. If no change replace keyboard

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Function keys are special keys used for assigning program
shortcuts and specialty tasks to the keyboard.
They are located at the top of most keyboards and labeled
"F1" through "F12."
Some keyboards may only feature 10 function keys, while
others may have as many as 18. These keys often go unutilized by the average
computer user, but they may have very important tasks for some users, which can
lead to problems when the keys do not respond.
Fixing nonresponsive or malfunctioning function keys is
quite simple, and should only take a few minutes.

Connect your keyboard to your computer, and power it up.
Open a program that uses the function keys such as Microsoft
Word or Microsoft Excel. Check your keyboard for an "F-Lock" or
"Function Lock" key.
This key is used to toggle function-key support; when it is
toggled on, the function keys will not work.
Press the "F-Lock" key and then try using a
function key in the selected program. "F1" is a good key to test,
because it is set to open a "Help" document in all Microsoft
software.
If the key does not work, press the "F-Lock" key a
second time, and test the keys again.
If the keys still do not work and you are running the
Windows 7 operating system, you may need to install a "hotfix" from
Microsoft to fix the key functionality.
Navigate to the link entitled "Microsoft Support: Some
Function Keys do not Work Correctly." (See Below.)
Some function keys or keyboard shortcuts do not
work correctly on a computer that is running Windows 7http://support.microsoft.com/kb/975741
Resolve unexpected Function (F1 - F12) or other
special key behavior on a Microsoft keyboardhttp://support.microsoft.com/kb/894513
Click on "View and request hotfix downloads"
located beneath the title of the article to access the Microsoft Hotfix
database.
Agree to the terms and conditions, then download the hotfix.
When the download is finished, run the downloaded file and
follow the on-screen instructions.
You may need to restart your computer after the installation
is complete.
Your function keys should now work properly.

Function keys are special keys used for assigning program
shortcuts and specialty tasks to the keyboard.
They are located at the top of most keyboards and labeled
"F1" through "F12."
Some keyboards may only feature 10 function keys, while
others may have as many as 18. These keys often go unutilized by the average
computer user, but they may have very important tasks for some users, which can
lead to problems when the keys do not respond.
Fixing nonresponsive or malfunctioning function keys is
quite simple, and should only take a few minutes.

Connect your keyboard to your computer, and power it up.
Open a program that uses the function keys such as Microsoft
Word or Microsoft Excel. Check your keyboard for an "F-Lock" or
"Function Lock" key.
This key is used to toggle function-key support; when it is
toggled on, the function keys will not work.
Press the "F-Lock" key and then try using a
function key in the selected program. "F1" is a good key to test,
because it is set to open a "Help" document in all Microsoft
software.
If the key does not work, press the "F-Lock" key a
second time, and test the keys again.
If the keys still do not work and you are running the
Windows 7 operating system, you may need to install a "hotfix" from
Microsoft to fix the key functionality.
Navigate to the link entitled "Microsoft Support: Some
Function Keys do not Work Correctly." (See Below.)
Some function keys or keyboard shortcuts do not
work correctly on a computer that is running Windows 7http://support.microsoft.com/kb/975741
Resolve unexpected Function (F1 - F12) or other
special key behavior on a Microsoft keyboardhttp://support.microsoft.com/kb/894513
Click on "View and request hotfix downloads"
located beneath the title of the article to access the Microsoft Hotfix
database.
Agree to the terms and conditions, then download the hotfix.
When the download is finished, run the downloaded file and
follow the on-screen instructions.
You may need to restart your computer after the installation
is complete.
Your function keys should now work properly.

Function keys are special keys used for assigning program
shortcuts and specialty tasks to the keyboard.
They are located at the top of most keyboards and labeled
"F1" through "F12."
Some keyboards may only feature 10 function keys, while
others may have as many as 18. These keys often go unutilized by the average
computer user, but they may have very important tasks for some users, which can
lead to problems when the keys do not respond.
Fixing nonresponsive or malfunctioning function keys is
quite simple, and should only take a few minutes.

Connect your keyboard to your computer, and power it up.
Open a program that uses the function keys such as Microsoft
Word or Microsoft Excel. Check your keyboard for an "F-Lock" or
"Function Lock" key.
This key is used to toggle function-key support; when it is
toggled on, the function keys will not work.
Press the "F-Lock" key and then try using a
function key in the selected program. "F1" is a good key to test,
because it is set to open a "Help" document in all Microsoft
software.
If the key does not work, press the "F-Lock" key a
second time, and test the keys again.
If the keys still do not work and you are running the
Windows 7 operating system, you may need to install a "hotfix" from
Microsoft to fix the key functionality.
Navigate to the link entitled "Microsoft Support: Some
Function Keys do not Work Correctly." (See Below.)
Some function keys or keyboard shortcuts do not
work correctly on a computer that is running Windows 7http://support.microsoft.com/kb/975741
Resolve unexpected Function (F1 - F12) or other
special key behavior on a Microsoft keyboardhttp://support.microsoft.com/kb/894513
Click on "View and request hotfix downloads"
located beneath the title of the article to access the Microsoft Hotfix
database.
Agree to the terms and conditions, then download the hotfix.
When the download is finished, run the downloaded file and
follow the on-screen instructions.
You may need to restart your computer after the installation
is complete.
Your function keys should now work properly.

FN (Function Key) that is usually located near the bottom left on the keyboard is not a key that you press by itself to do anything. The FN key works in combination with the (F1 thru F12) and any other key that has the same symbol or color as the FN Key. You have to Press and HOLD the FN key while pressing another key.

If the FN key is Blue and for example your F8 key has a (white F8 on it and a Blue battery icon on it) then to see your battery metor (how much charge it has left) you would Press the FN and hold it then press the F8 key. The F8 that is white does not require you to press the Blue FN.

Sometimes the FN key might have a white square on it, then the keys that work with the FN key will also have a symbol with a white square around it.

FN (Function Key) that is usually located near the bottom left on the
keyboard is not a key that you press by itself to do anything. The FN
key works in combination with the (F1 thru F12) and any other key that
has the same symbol or color as the FN Key. You have to Press and HOLD
the FN key while pressing another key.

If the FN key is Blue and
for example your F8 key has a (white F8 on it and a Blue battery icon on
it) then to see your battery metor (how much charge it has left) you
would Press the FN and hold it then press the F8 key. The F8 that is
white does not require you to press the Blue FN.

Sometimes the FN
key might have a white square on it, then the keys that work with the
FN key will also have a symbol with a white square around it.

you have toggled on your numeric keys.... take a look at your keyboard for NM likely printed on the side of one of the top keys .... hit function (fn) and the nm key once at the same time... that should shut off number lock and return your keyboard to normal

Contact Customer Services, explain the Serial Key does not work, they'll have the product code of the copy that shipped with your PC.Tell them that it does not work, and want a replacement key. They should then provide you with one, and disable the one that you say does not work.

If Works Suite 2000 was preinstalled when you purchased your computer, and you lost the CD key, you must call your equipment manufacturer for a new CD key for Works Suite 2000.

For information about how to contact your equipment manufacturer, visit the following Microsoft Web site:
http://support.microsoft.com/gp/vendorsIf Works Suite 2000 was not preinstalled, and you lost your CD key, please call Works Suite 2000 support for a new CD key.

Mostly the functions keys are worked by the function key. that means there you see the fucn key in the corner of the keyboard press that key press any function key is worked. Without pressing the fucn key you cant. there you noticed the key two thing are wrote on the keyboard. one is top on the key and other on the down on the key try it and inform me.